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The blacktailed spurdog, ''Squalus melanurus'', is a dogfish, a member of the family Squalidae, found around New Caledonia in the central Pacific Ocean, at depths from 320 to 320 m. Its length is up to 75 cm. Its reproduction is ovoviviparous. ==Parasites== The blacktailed spurdog has been seldom studied for parasites. The 1 mm-long monogenean ''Triloculotrema chisholmae'' has been described in 2009 from three specimens found in the nasal tissue of a single shark caught off New Caledonia.〔Justine, J.-L. 2009: A new species of ''Triloculotrema'' Kearn, 1993 (Monogenea: Monocotylidae) from a deep-sea shark, the blacktailed spurdog ''Squalus melanurus'' (Squaliformes: Squalidae), off New Caledonia. Systematic Parasitology, 74, 59-63. 〕 ''T. chisholmae'' was the second species described in the genus ''Triloculotrema'' Kearn, 1993 (family Monocotylidae).〔Kearn, G. C. 1993: ''Triloculotrema japanicae'' n.g., n. sp. (Monogenea: Monocotylidae) from the olfactory sacs of the Japanese topeshark ''Hemitriakis japanica'' (Müller & Henle, 1839) (Carcharhiniformes: Triakidae). Systematic Parasitology, 26, 53-57.〕 Species of ''Triloculotrema'' appear to be limited to deep-sea sharks, either triakids or squalids (possibly etmopterids).〔 The blacktailed spurdog is also the host of external parasites such as the aegiid isopod ''Aega angustata'' on the skin.〔Trilles, J.-P. & Justine, J.-L. 2004: Une nouvelle espèce de Cymothoidae et trois Aegidae (Crustacea, Isopoda) récoltés sur des poissons de mer profonde au large de la Nouvelle-Calédonie. Zoosystema, 26, 211-233. 〕 Internal parasites include several trypanorhynch cestodes in the spiral intestine, such as ''Vittirhynchus squali'' and ''Gilquinia'' sp.〔Beveridge, I. & Justine, J.-L. 2006: Gilquiniid cestodes (Trypanorhyncha) from elasmobranch fishes off New Caledonia with descriptions of two new genera and a new species. Systematic Parasitology, 65, 235-249. 〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Blacktailed spurdog」の詳細全文を読む スポンサード リンク
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